package com.cc.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.nio.charset.Charset;
import java.util.List;

@Configuration
@ComponentScan("com.cc.controller")
@EnableWebMvc   //开启SpringMVC的功能
public class SpringMVCConfig  implements WebMvcConfigurer {
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        StringHttpMessageConverter converter = new StringHttpMessageConverter();
        converter.setDefaultCharset(Charset.forName("UTF-8"));
        converters.add(0,converter);
    }
    //配置文件上传解析器
    @Bean
    public CommonsMultipartResolver multipartResolver() {
        CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
        // 最大文件 2MB
        commonsMultipartResolver.setMaxUploadSize(1024 * 1024 * 2);

        commonsMultipartResolver.setDefaultEncoding("UTF-8");

        return commonsMultipartResolver;
    }
    // 配置静态资源映射
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        // 映射 classpath 下的 static 目录  classpath:/static/ 是指 src/main/resources/static/
        //映射的是 webapp/static/ 目录，应使用 file:./static/（相对于当前 Web 应用根目录）
//        registry.addResourceHandler("/static/**").addResourceLocations("file:./static/*");

        // 映射用户上传文件的访问路径
        registry.addResourceHandler("/upload/**").
                addResourceLocations("./static/upload/");
    }
}
